Airbag control unit with part number 77960-T90-A140-M2

What does the airbag control unit 77960-T90-A140-M2 do?

This control unit is the central unit of the SRS system of Honda. It evaluates the crash sensors, determines in a crash which airbags and seatbelt pretensioners to trigger, and checks the entire system continuously. It makes faults visible via the airbag warning light.

Evaluation runs not only in an accident but permanently in the background. The control constantly compares its own measured values with the specifications.

If an accident has occurred, the unit secures crash data and remains locked afterwards.

Why does the control unit 77960-T90-A140-M2 fail?

Most often the cause is crash data from an accident, even without an airbag triggering. Aged components, cold solder joints, moisture and corrosion, and voltage spikes also contribute.

Further causes at a glance:

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or jump-starting

A normal diagnostic tool cannot erase crash data. Stored data shows an event, but it does not yet prove a defect in the electronics.

How can you tell that the 77960-T90-A140-M2 is defective?

A defect shows itself through the airbag warning light, through fault messages in the instrument cluster and through a diagnostic tool that cannot make contact with the control unit. A fault memory that cannot be cleared also belongs to these signs.

Pay particular attention to these signs:

• Airbag warning light permanently or intermittently active
• Fault message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. Do not ignore the warning.

Which vehicles is the 77960-T90-A140-M2 fitted in?

The basis is our stored data; depending on equipment there may be deviations. The 77960-T90-A140-M2 is fitted in these vehicles: Honda Pilot 4th generation (from 2022).

The overview of the stored vehicles follows here.

• Honda Pilot 4th generation (from 2022)

Compare the label of the removed unit with this page to ensure you have the right unit. Have the fault memory read out beforehand; only this result shows whether the control unit is defective or whether a plug or cable is the cause.

How does the repair of the 77960-T90-A140-M2 work?

First read out the fault memory and enclose the log. Then disconnect the battery, only then remove the control unit, and create a repair order online.

Next, send in the well-packed unit. Airbag24 checks it on the test bench, repairs defective components, erases the stored crash data and carries out a function test.

At Airbag24 these steps usually take 3–4 working days before your own unit is returned to you.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 77960-T90-A140-M2 get to Airbag24?

The unit goes to Airbag24 as a parcel; alternatively, UPS collects it for an extra charge. After the repair, Airbag24 sends it back by UPS.

Enclose the printed repair order with the parcel, and pack the unit shock-resistant.